Directions: Given the side lengths, determine whether the triangle is acute, right, obtuse, or not a triangle.
7. 20, 21, 29
8. 5, 9, 10
Not a A
Acute
Right
Obtuse
Not a A
Acute
Right
Obtuse
9. 3, 15, 18
10. 16, 21, 28
Not a A
Acute
Right
Obtuse
Not a A
Acute
Right
Obtuse
Topic 3: Special Right Triangles
Directions: Label the sides for each special right triangle.
45°-45°-90°
Special Right Triangle
45
A
45
30°-60°-90°
Special Right Triangle
60
30
Directions: Find the value of each variable.
11.
y
45
5
12.
30°
y
x =
y=
14.
15.
42
45
16
x =
y=
y
13.
9
22
x =
y=
16.
60
y
x =
y=
x =
y=
y
19/2
45
x=
y=
